How to Make a Three Axis CNC Machine Cheaply and

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How to Make a Three Axis CNC Machine (Cheaply and Easily)by oomlout on June 29, 2007 Table of Contents License: Attribution Share Alike (by-sa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intro: How to Make a Three Axis CNC Machine (Cheaply and Easily) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 1: Others Who Have Finished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 2: Specs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 3: Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 4: Required Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . File Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 5: Printing Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . File Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 6: Gluing Down the Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 7: Cutout Pieces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 8: Cheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 9: Hole Drilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . step 10: Assembling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 2 3 4 4 5 6 7 8 8 9 9 9

File Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 step 11: Software, Wiring and Configuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 step 12: Finished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

http://www.instructables.com/id/How-to-Make-a-Three-Axis-CNC-Machine-Cheaply-and-/

License: Attribution Share Alike (by-sa) Intro: How to Make a Three Axis CNC Machine (Cheaply and Easily)The idea behind this Instructable was to fulfill my desire for a desktop sized CNC machine. While it would have been nice to purchase an off the shelf unit the issue of price as well as size proved prohibitive. With this in mind I endeavored to design and build a three axis CNC machine with the following factors in mind: -Use Simple tools (needs only a drill press, band saw, and hand tools) -Low Cost (this kind of got away from me however with everything bought off the shelf the cost for all parts is under $600 (significant savings could be made by skillfully sourcing some pieces)) -Small footprint (30" x 25" footprint) -Usable working envelope (10" X-axis, 14" Y-Axis, 4" Z-Axis) -Relativly fast cut rate (60" per minute) -Small part count (fewer than 30 unique parts) -Easy to source parts (all parts available from 4 sources (Home Depot + 3 online sources) -Ability to cut ply-wood (Succesful) Lets get started... UPDATE: - Coming soon the ability to order pre-cut MDF pieces from oomlout

step 1: Others Who Have FinishedA salute to those who have laboured through to this point (and to demonstrate that it is reproducable) Here are some pictures of other peoples machines. Photo 1 - Chris and his friend put together this unit; laser cutting the parts out of half inch acrylic. Not only does it look super it must weigh a ton. But kudos, anyone who's worked with acrylic knows laser cutting it is great but it is a very very unfriendly material to drill and there is a lot of side drilling in this design. Good job guys, check out more details (and photos including some testing with circuit boards) on Chris's blog rainbowlazer.com . I particularly like his work with making 3-d objects out of 2d cuts (here) . Photo 2 - Sam McCaskill has finished his desktop CNC machine and it's looking really really nice. Super impressively he also resisted the urge to cheat and cut all his pieces by hand. I'm really impressed. Photo 3 - Angry Monk's - With MDF pieces cut on a laser cutter and drive converted from toothed belts to threaded rod Photo 4 - Bret Golab's - Bret has completed his and gone through the extra step of getting it setup to work with Linux CNC (a task I attempted and was foiled by complexity). If you're interested in his settings you can send him a message (Instructable ID: bretlyssii ) ). Great job Bret! (If you have built one and would like it featured here, please send me a PM and we can arrange for the sending of photos)

http://www.instructables.com/id/How-to-Make-a-Three-Axis-CNC-Machine-Cheaply-and-/

Image Notes 1. Photo 1 - Sam McCaskill's Finished (handcut) Machine Image Notes 1. Cris and his friends finished CNC machine. Check out more details about this build at RainbowLazer.com

Image Notes 1. Photo 2 - Angry Monk's Finished Machine.

Image Notes 1. Photo 3 - Bret Golab's

step 2: Specs.I'm afraid I don't have the space (or the expertise for that matter) to go into the fundamentals of CNC here but there is one websites in particular I found quite useful in my research. CNCZone.com - A discussion forum which has a DIY machine section which is a wealth of knowledge ( direct link ) Machine Details: Cutting Head: Dremel or Dremel Type Tool Axis Details: X Axis travel: 14" Drive: Toothed Timing Belt Speed: 60" min Acceleration: 1" per second2 Resolution: 1/2000" Pulses Per inch: 2001 Y Axis Travel: 10" Drive: Toothed Timing Belt Speed: 60" min Acceleration: 1" per second2 Resolution: 1/2000" Pulses Per inch: 2001

http://www.instructables.com/id/How-to-Make-a-Three-Axis-CNC-Machine-Cheaply-and-/

Z Axis (up down) Travel: 4" Drive: Threaded Rod Acceleration: .2" per second2 Speed: 12" min Resolution: 1/8000" Pulses Per Inch: 8000

step 3: Required ToolsThe goal was to try and keep the tools required within the realm of an average handyman's shop. Power Tools: -Band Saw or Scroll Saw -Drill Press (drill bits 1/4", 5/16", 7/16", 5/8", 7/8", 8mm also Q (5/16" closest imperial drill bit) -Printer (seemed like the right category) -Dremel or Similar Tool (to attach to the finished machine) Hand Tools: -Rubber Mallet (to provide "persuasion" when neccesary) -Hex Keys (5/64", 1/16") -Screw Driver -Glue Stick (UHU) or spray adhesive -Adjustable Wrench (or 7/16" socket and ratchet)

step 4: Required PartsThe attached PDF (CNC-Part-Summary.pdf) provides detailed cost and sourcing information for each and every required part. Listed here is only a summary Sheet Stock --- $20 -a 48" x 48" piece of 1/2" thick MDF (any 1/2" sheet stock can be used I have plans to make my next version out of UHMW but cost was prohibitive this time around) -a 5"x5" piece of 3/4" thick MDF (this is used to make spacers so any piece of 3/4" stock found around the shop could be used) Motors and Controllers ---- $255 -An entire instructable could b